Open Wide! Challenge Guide!

Open Wide! is a challenge that is needed for the achievement Challenge Accepted which requires you to kill a total of 750 enemies at point blank range. Finishing this challenge unlocks a new challenge (Shotgun Sniper) and is usually one of two challeneges that keep players from earning their achievement/trophy.

WARNING: Remember that you will only get the Achievement by completing all level one challenges on a SINGLE character. The challenges from other characters do not cross over.

The easiest and fastest way to complete this challenge is to farm the mobs in Caustic Caverns. You'll need the following in order to do this quickly:

A character that is atleast level 45+ (50 preffered)

A Shotgun with a decent clip size and damage ( Conference Call works very well)

A little bit of time, you're in for a long one if you're just starting this challenge.

If you've beaten the game once already then you'll want to switch your mode back to Normal Mode with character of choice. In normal mode all the enemies will be of the level 34-36 variety and easy enough for you to blow right through all of them. A run usually takes about 15+ minutes if your quick enough and yields about 80 or so kills.

When you start off kill all the varkids right outside the first set of doors. Make sure you run through the arch to your left and back again to make them all spawn (about 2-3 waves). Your going to circle the map clockwise. Avoid crystalisks, they are not worth your time and effort. Make your way down the ladder into the abandoned DAHL facility and open the door to your left. Here you'll encounter spiderants which at your level should be really no problem. Circle the entire spiderant hive including the secluded tunnel in the back (which also has a chest at the end of it).

Next comes threshers; now this one is your choice personally. I've skipped the threshers multiple times in order to kill the varkids since they yield a loss less of a challenge and actually jump straight at you making for an easy +1 to your challenge score. Whether or not you kill the threshers continue heading clockwise till you reach the varkid infested warehouse.*

Once inside the warehouse there will be tons of varkids spawning, again once you've killed them all run around the entire warehouse and more will spawn (about 2-3 waves). From here you can decide whether or not to save and quit or continue on to kill the threshers on the other side. Should you choose to kill the threshers continue on a little bit more to a tiny cave underpass where a stream of acide runs through the middle of it. A few varkid spawn here and simply aren't worth it if you don't want to kill the threshers. Save and quit and repeat the process.

Once the challenge has been completed the game will count all kills you've even accomplished for the hidden challenge and put them towards it earning it for most players instantly.

*Sidenote: If you've completed the quest Minecart Mischief there will be a side area along the railroad tracks where you had to push the minecart through a tiny varkid hive. 5-6 varkid spawn out of there and you can stop here to quickly pick up a few kills for this challenge.